//position--------------------------------------------------------------
@mixin absolute-tl($top,$left){
    position:absolute;
    top:#{$top};
    left: #{$left};
}
@mixin absolute-tr($top,$right){
    position:absolute;
    top:#{$top};
    right: #{$right};
}
//order-radius ------------------------------------------------------------------
@mixin border-radius-all($radius:5px){
    -webkit-border-radius: #{$radius};
	-moz-border-radius: #{$radius};
	border-radius: #{$radius};
}
//box-shadow ---------------------------------------------------------------------
$shadow-default:0 1px 2px rgba(0, 0, 0, 0.5);
@mixin box-shadow($shadow){
    box-shadow: #{$shadow};
	-moz-box-shadow: #{$shadow};
    -webkit-box-shadow: #{$shadow};
}